Aqueous dispersion of potassium salt of 4-sulpho-peroxybenzoic acid stabilized with a potassium salt
US4738794A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 7, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C407/006
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Aqueous compositions containing an organic peroxyacid such as the mono-potassium salt of 4-sulpho-peroxybenzoic acid (KSPB) would be convenient to employ for bleaching/washing or disinfection especially of aqueous media, but suffer from loss of available oxygen (Avox) from the peracid during storage. The problem of storage instability can be alleviated to a considerable extent by employing the KSPB in particulate form and incorporating in the aqueous phase a water-soluble potassium salt of a non-reducing acid having a pK.sub.a of below 6, preferably a non-halide. It is desirable to use at least 1% and preferably at least 5% w/w solution of the potassium salt, of which suitable examples are potassium sulphate and nitrate. The pH of the aqueous phase is preferably brought to pH 2 to 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.